src/mapi/glapi/glapi_priv.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #ifndef _GLAPI_PRIV_H
  27 #define _GLAPI_PRIV_H
  28
  29 #include "glthread.h"
  30 #include "glapi.h"
  31
  32
  33
  34 /* getproc */
  35
  36 extern void
  37 _glapi_check_table_not_null(const struct _glapi_table *table);
  38
  39
  40 extern void
  41 _glapi_check_table(const struct _glapi_table *table);
  42
  43
  44 /* entrypoint */
  45
  46 extern void
  47 init_glapi_relocs_once(void);
  48
  49
  50 extern _glapi_proc
  51 generate_entrypoint(unsigned int functionOffset);
  52
  53
  54 extern void
  55 fill_in_entrypoint_offset(_glapi_proc entrypoint, unsigned int offset);
  56
  57
  58 extern _glapi_proc
  59 get_entrypoint_address(unsigned int functionOffset);
  60
  61
  62 /**
  63  * Size (in bytes) of dispatch function (entrypoint).
  64  */
  65 #if defined(USE_X86_ASM)
  66 # if defined(GLX_USE_TLS)
  67 #  define DISPATCH_FUNCTION_SIZE  16
  68 # elif defined(THREADS)
  69 #  define DISPATCH_FUNCTION_SIZE  32
  70 # else
  71 #  define DISPATCH_FUNCTION_SIZE  16
  72 # endif
  73 #endif
  74
  75 #if defined(USE_X64_64_ASM)
  76 # if defined(GLX_USE_TLS)
  77 #  define DISPATCH_FUNCTION_SIZE  16
  78 # endif
  79 #endif
  80
  81
  82 /**
  83  * Number of extension functions which we can dynamically add at runtime.
  84  *
  85  * Number of extension functions is also subject to the size of backing exec
  86  * mem we allocate. For the common case of dispatch stubs with size 16 bytes,
  87  * the two limits will be hit simultaneously. For larger dispatch function
  88  * sizes, MAX_EXTENSION_FUNCS is effectively reduced.
  89  */
  90 #define MAX_EXTENSION_FUNCS 256
  91
  92
  93 #endif